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A solution of thieno[3,2-c]pyridine (500 mg, 3.70 mmol) in anhydrous THF (10 mL) was stirred under argon and maintained at −78° C. while a solution of 1.6 M n-butyllithium in hexane (2.5 mL, 4.07 mmol) was added dropwise. The resulting wine red solution was stirred for 5 min. then DMF (573 μL, 7.4 mmol) was added. The cooling bath was removed and the reaction mixture was stirred at room temperature for 16 hr. The reaction mixture was treated with 10% aqueous HCl, made alkaline with saturated aqueous NaHCO3 and extracted with CH2Cl2 (2×50 mL) The combined organic fractions were concentrated in vacuo to give an oily residue which was subjected to flash chromatography on silica gel (70% ethyl acetate:hexanes) to give the title compound as a white solid (41.5%): 1H-NMR (300 MHz, DMSO-d6) δ 10.20 (s, 1H), 9.39 (s, 1H), 8.60 (s, 1H), 8.59 (d, J=5.5 Hz, 1H), 8.19 (d, J=5.6 Hz, 1H); MS (ES) m/e 164 (M+H)+.

1. additionwas added dropwise
2. customThe cooling bath was removed
3. stirringthe reaction mixture was stirred at room temperature for 16 hr
4. additionThe reaction mixture was treated with 10% aqueous HCl
5. extractionextracted with CH2Cl2 (2×50 mL) The combined organic fractions
6. concentrationwere concentrated in vacuo
7. customto give an oily residue which